Levandor

contract-scanner Activity Log

16 min read

For Agents

Reverse-chronological session log. Newest entries at top, grouped by date (## YYYY-MM-DD). Each bullet: one piece of work, short summary, wikilinks to docs touched. Updated by obsidian-documenter on every project doc write. Read by historian at bootstrap.

2026-06-04

  • Proxy/implementation source-target mismatch FIXED in the exploit stage (a distinct second root cause behind the 06-03 needs_review rows). Slither sometimes flags a PROXY contract’s OWN code — e.g. incorrect-return on an OZ TransparentUpgradeableProxy’s ifAdmin functions (upgradeTo, changeAdmin, admin, implementation, upgradeToAndCall, ifAdmin modifier), a textbook FP because the proxy returns via inline assembly. But the exploit stage’s fetch.fetch_resolved_source ALWAYS follows a proxy to its implementation and analyzes that, so the flagged snippets aren’t in the impl source → build_source correctly reports them missing → parked needs_review. NOT a size/budget issue: concrete case 0x9334e37f… (TransparentUpgradeableProxy) → impl Swych (0xb500…) is 132k chars, under the 200k budget. (Also: proxy resolution is nondeterministic across fetches — the Etherscan getsourcecode Implementation field varies — which is why a manual check saw the proxy and a later run saw the impl.) Fix: new fetch.fetch_analysis_source(...) — for a verified proxy with a verified impl, returns a SourceResult whose .files MERGES both source sets with namespaced keys [proxy] <path> + [impl] <path>; non-proxy / unverified-impl → plain source unchanged. The exploit stage’s _resolved_source_text now calls this instead of fetch_resolved_source (left intact), so Claude always sees BOTH layers (flagged code present regardless of layer + fuller admin/upgrade context); build_source’s finding-first ordering protects the flagged files if a future merge exceeds budget. The needs_review message was corrected from the misleading “source too large” to an honest “flagged code not found in the fetched proxy/implementation source within the budget.” Validation: re-ran 0x9334 live → analyzed → false_positive (Informational, High confidence), all 6 findings judged with a rationale correctly explaining the ifAdmin assembly-return FP (proving it saw the proxy code via the merge); after this + deleting a separate stale 06-03 orphan row (0x528d…, churned out of the High-findings batch), bsc_contract_analysis is now 16 rows, all false_positive, 0 needs_review. Refines (not supersedes) the whitespace-normalization needs_review fix in adhoc-analysis-and-queue — that handled snippet matching against one source set; this is a distinct root cause (wrong source target entirely). Process: brainstorm → plan (docs/superpowers/plans/2026-06-04-proxy-source-merge.md) → subagent TDD → 42 tests pass. NOT yet committed (unstaged: scanner/fetch.py, scanner/exploit.py, tests/test_fetch_resolved.py, tests/test_exploit.py). — proxy-source-merge-gotcha
  • On-demand contract analysis + request queue SHIPPED (commit 272a224, pushed to main). scanner.exploit gained two new entrypoints alongside the daily batch loop, all three funneling through one extracted DRY function analyze_contract(cfg, dsn, cw, existing, run_label). (1) python -m scanner.exploit --address 0x… [--chain bsc] analyzes ANY contract: if the address has High Slither findings in the latest bsc_finding batch → Claude judges those (same path as the daily stage); if none → Claude does an open-ended source audit via a new prompt variant (“no static-analysis findings provided, audit for exploitable vulns”); result upserts to bsc_contract_analysis with run_label='adhoc'. (2) python -m scanner.exploit --drain-requests [--limit N] drains a new queue. New table public.bsc_analysis_request (applied via Supabase MCP): id, created_at, chain, contract_address, status (pending|running|done|error), error, requested_by, analyzed_at, claimed_at; RLS = authenticated insert + select (CRM enqueues + watches), worker connects as the pooler postgres role (bypasses RLS). Durable queue-worker invariants: concurrency-safe atomic claim (UPDATE … status='running' WHERE id=(SELECT id … status='pending' ORDER BY created_at LIMIT 1 FOR UPDATE SKIP LOCKED) RETURNING …); stale-row reaper at drain start requeues rows stuck running with claimed_at < now() - 30 min (recovers killed processes); per-request exception safety best-effort marks a failed row error with a nested try/except swallowing secondary DB failures so a claimed row never strands in running, and a Claude rate-limit re-queues the in-flight row to pending and stops the drain cleanly; results land in the SAME bsc_contract_analysis table the CRM verdict panel already reads (joined on contract_address) — no new result schema. Bundled bug fix — the needs_review gotcha: build_source now returns (text, truncated) instead of (text, complete); the old code conflated “did source fit the 200k budget” with “did every Slither snippet match as an exact substring,” emitting the misleading “source too large to retain finding code” even when the full source was present (the two 2026-06-03 proxy contracts were only 37–70k chars, well under budget, but got parked); now snippet matching is whitespace-normalized and a contract is marked needs_review only when truncation ACTUALLY drops finding-bearing code, with an honest message — this supersedes the source-budget explanation in exploit-stage-deploy-handoff’s 2026-06-03 live-validation note. Process: brainstorm → writing-plans (docs/superpowers/plans/2026-06-04-adhoc-analysis.md) → subagent-driven TDD → two-stage review (spec-compliance + code-quality) → fix pass addressing 8 review findings (reaper, drain exception safety, --limit 50 sentinel bug, RateLimitError ordering, stale existing dict during drain, double Etherscan fetch in the open-ended path, --dry-run --address guard, live-test hygiene) → 37 tests pass. Spec: docs/superpowers/specs/2026-06-04-adhoc-analysis-design.md. Status / pending handoffs (both await other agents): (1) @deploy — add a SECOND systemd timer running --drain-requests every ~5–10 min (frequent, lightweight) alongside the daily 06:00 batch timer; new pin 272a224. (2) @crm — an “Analyze this contract” action that inserts into bsc_analysis_request, watches status, refetches the verdict panel on done. The queue worker is not live until @deploy’s drain timer lands — enqueued requests sit pending until then. — adhoc-analysis-and-queue

2026-06-03

  • First LIVE production run of the LLM exploit-analysis stage — clean pass, verdicts validated. Operator minted the 1-year CLAUDE_CODE_OAUTH_TOKEN via claude setup-token; scanner.exploit (commit bce6238) was run once locally against the day’s batch batch-2026-06-03, writing to the prod Supabase bsc_contract_analysis table. Result: 16 High-finding contracts → 14 analyzed (all false_positive), 2 needs_review, 0 failures, exit 0. Two durable learnings: (1) verdicts are high-quality and grounded, not rubber-stamped — spot-checked 4 rationales, each correctly identified provenance and cited specific functions/lines (DooarSwapV2Pair weak-prng = standard UniV2 TWAP timestamp truncation; stake_pool emergencyWithdraw = onlyRole(ADMIN_ROLE) + deposit() forwards funds to masterAddress so ~zero drainable balance; Vault = GMX/Gambit-derived with a shared OZ nonReentrant guard, mislabeled reentrancy-eth is only ERC20 outflow; VaultSupervisor’s Solady incorrect-shift + OZ Math.mulDiv incorrect-exp = known library-detector FPs); all injection_observed=false, per_finding populated with finding_keys — 14/14 false_positive is the honest correct outcome for a day’s batch of forked/library-heavy unaudited BSC contracts (the triage layer working as designed: vulnerable ≠ exploitable, NOT a defaulting bug). (2) source-size budget defers large proxy implementations — the 2 needs_review were both large proxy→implementation contracts where build_source couldn’t retain the finding’s code snippet within the source budget, so the stage deliberately marked them needs_review (“source too large to retain finding code”) rather than analyze truncated code; by design (findings-aware truncation guard), produces a small steady trickle of needs_review rows that do NOT fail the run or affect exit codes; future lever = raise source budget / improve per-file selection. Also: the BSC_EXPLOIT_ENV GH-Actions secret on wowjeeez/terraform is now set with all 3 keys (token, session-pooler DSN, Etherscan key), clearing @deploy’s gate to dispatch the VM role. Project state: exploit stage live-validated against prod; VM deploy unblocked, awaiting @deploy to write+dispatch the role. — exploit-stage-deploy-handoff
  • Cross-team handoff: the LLM exploit-analysis stage went to @deploy for VM runtime provisioning (and @deploy accepted). scanner/exploit.py (committed bce6238, live-verified against a real claude -p) is being deployed on the shared polymarket-infra e2-small box; @deploy is writing the deploy role. Negotiation settled the full runtime spec (transcript: /Users/levander/coding/polymarket_fetch/AGENT_HANDOFF.md). Agreed shape: dedicated unprivileged user bsc-exploit (home /opt/bsc-exploit, no sudo); /opt/bsc-exploit/repo/ = shallow clone of github.com/wowjeeez/bsc-vuln-scanner pinned to commit bce62380a5bdf759facb512b0ba809180c63f79e (NOT tracking main — deliberate Ansible deploys only); uv + .venv via uv sync --frozen --no-dev; Python 3.12 (requires-python >=3.12); claude CLI installed user-local, authed via the 1-year CLAUDE_CODE_OAUTH_TOKEN from claude setup-token. Secrets: a NEW least-privilege GH-Actions secret BSC_EXPLOIT_ENV in wowjeeez/terraform (separate from POLYMARKET_FETCH_ENV so bsc-exploit can’t see Telegram/pm tokens); CD materializes /opt/bsc-exploit/.env mode 0600 with exactly 3 keys (CLAUDE_CODE_OAUTH_TOKEN, DATABASE_URL, ETHERSCAN_API_KEY); per gotcha #25 the GH secret is the ONLY source of truth (local secrets/*.env gitignored + CD-ignored). systemd: oneshot service + timer *-*-* 06:00:00 UTC, Persistent=true, runs after the 04:17 UTC GH scan+load fills the day’s bsc_finding batch; User=bsc-exploit, WorkingDirectory=/opt/bsc-exploit/repo, EnvironmentFile=.env, RuntimeMaxSec=7200, ExecStart=.venv/bin/python -m scanner.exploit, journald output, OnFailure= alert on exit 1 or 2 (0 = silent). Key technical facts: the exploit stage is slither-free (slither/solc-select are in the main closure so --no-dev still installs them, but scanner.exploit never imports/invokes them — proxy-following Etherscan fetch, no compilation → NO solc-select install step on the VM); it writes nothing to disk (source in memory, prompt→claude via stdin, JSON from stdout, verdicts upserted straight to Postgres; only writable need is the CLI’s own ~/.claude config/cache, optionally CLAUDE_CONFIG_DIR); reads exactly 3 env vars; DATABASE_URL must be the Session Pooler :5432, NOT the :6543 transaction pooler (upserts with prepare_threshold=None; transaction pooler breaks prepared-statement-less upserts — same DSN the GH scan/load uses); exit codes 0 ok / 1 DB-error|rate-limit-stop|all-failed / 2 misconfig (only 1 & 2 alert-worthy; a Claude rate-limit stops the batch cleanly and self-heals next run via the unchanged-source cache); future-update protocol starts at @bscvuln pings @deploy with a new SHA → bump pin + redeploy, graduating to workflow_dispatch later. BLOCKED ON OPERATOR: @deploy can’t dispatch until three items land in BSC_EXPLOIT_ENV out-of-band — (1) claude setup-token → 1-year token, (2) confirmed session-pooler DSN, (3) Etherscan key. Stood down (do not resurface): the “rotate the Supabase DB password” item was cancelled — the Round-53 rogue DB writer was the operator’s own forgotten macOS LaunchAgent com.levander.polymarket-bot, not a third party (resolved Round 54). — exploit-stage-deploy-handoff

2026-05-31

  • Findings loader SHIPPED (built + reviewed via subagent-driven TDD; committed c5cec6e, pushed to main): python -m scanner.load. A file-driven CLI that loads a scan’s findings CSV into Supabase [[supabase-findings-store|public.bsc_finding]] — the durable fix for the hand-transcription gotcha that corrupted the first 96-row load. Three units in scanner/load.py: build_rows (pure CSV→insert-tuples: header validation for missing/duplicate columns, per-row casts line/age_days→int and tvl_usd/score→Decimal, empty→NULL, strips + row-number-validates the NOT-NULL identity columns chain/contract_address/detector); replace_run (atomic replace-by-run_label in ONE psycopg3 transaction — advisory lock → count → gates → DELETE → executemany; commits via the plain with psycopg.connect(...) block, never conn.transaction()); main (exit codes 0 ok/dry-run, 2 usage, 1 DB). Key decision: score moved into the scan CSV — scanner/triage.py CSV_COLUMNS gained a trailing score, so the loader is a pure transport (no recompute, no config dep, no scan-vs-load drift); supersedes the “computed at load time” framing in supabase-findings-store. Safety: --replace required to overwrite a populated label, refuse-empty unless --allow-empty, --dry-run, advisory lock for concurrent same-label loads, DSN/password never printed (errors carry host/dbname only). Connection: DATABASE_URL = Supabase Session Pooler DSN (IPv4 :5432, postgres.<ref>) + ?sslmode=require + prepare_threshold=None; NOT the IPv6-only direct endpoint or the prepared-statement-breaking :6543 transaction pooler. Dep psycopg[binary]>=3.2,<4; .env/.env.* gitignored; one live round-trip test behind a dedicated db pytest marker (deselected by default, skipif no DATABASE_URL). Two-pass adversarial pre-validation paid off — caught real design bugs before any code: execute_values doesn’t exist in psycopg3 (→ executemany), the conn.transaction()-on-non-autocommit silent-no-commit trap, float→numeric precision loss (→ Decimal), and the IPv6/transaction-pooler connection pitfalls. Final holistic review: Ready (89 passed, 4 deselected). Remaining: a one-time live db round-trip with DATABASE_URL set; historical output/ CSVs are rejected (predate the score column). Spec/plan: docs/superpowers/{specs,plans}/2026-05-31-findings-loader*. — findings-loader

2026-05-30

  • Project scoped from scratch as a side-thread inside a polymarket-fetch session. Designed a 5-stage workflow (Discover → Resolve → Fetch → Analyze → Triage) that takes DeFiLlama’s protocol list and narrows ~700 protocols on a chain to a ranked CSV of ~20 worth human review for white-hat / responsible-disclosure research. MVP scope: BSC only, Slither only in Docker, ~200 lines Python+bash, ~40 min wall-clock. Phase 2: multi-chain (Etherscan v1 API family — Ethereum/Polygon/Arbitrum/Base/Optimism), Aderyn for second-opinion, source caching, daily diff. Phase 3: Mythril/Halmos on shortlists, disclosure-draft generator, triage UI. Captured the full discovery trail (DeFiLlama BSC funnel: 696 → 175 → 55 unaudited → 26 high-priority → 154 total; top-5 starting targets led by EA Finance as the validation target). Two load-bearing gotchas baked into the design: (1) DeFiLlama chain name is "Binance" not "BSC" in chains[] AND chainTvls keys; (2) DeFiLlama audits field is stale — 0 sometimes means “no audit,” sometimes “DeFiLlama doesn’t know” (canonical false-positive: Frax Swap BSC port). Honest caveats also written down: Slither FP rate is high (Stage 5 triage is half the engineering), ~30–40% of small-protocol BSC contracts are source-unverified, “vulnerable” ≠ “exploitable” (workflow narrows, doesn’t exploit), and white-hat economics are weak below the $5M mcap tier. Status: designed, not implemented. Suggested filesystem location ~/coding/contract_scanner/ — sibling to ~/coding/polymarket_fetch, not nested. — contract-scanner

  • Initialized project folder, LOG, TOPICS.

  • Planning session: project moved from designed → planned, ready to execute (still no code). Created a 10-task TDD implementation plan at /Users/levander/coding/bsc-vuln-scanner/docs/superpowers/plans/2026-05-30-mvp-bsc-scanner.md. Build strategy: vertical-slice-first — push ONE real contract (EA Finance) through all 5 stages end-to-end (Tasks 2–7) before generalizing to the batch funnel (Task 8); fastest path to a real Slither finding, de-risks each stage on live data. New tech decisions: (1) pin Python 3.12 not system 3.14 via uv — Slither lags 3.14; also matches the Docker base image; (2) Etherscan V2 unified API (chainid=56, single key) instead of legacy per-chain BscScan → Stage 3 is already Phase-2-multichain-ready, base URL config-driven; (3) Slither runs as a PATH subprocess so local uv install behaves identically to the final container — whole pipeline goes in ONE Dockerfile at the end (Task 9), not stage-by-stage (user preference); (4) API key is a placeholder — build/test on saved fixtures, live EA Finance validation deferred to Task 10 (blocked on the user adding a free Etherscan key); (5) architecture refinement — each stage splits pure logic (filtering/parsing/scoring, unit-tested) from I/O (HTTP/subprocess, thin wrappers); Stage 5 triage confirmed the largest task. Env facts discovered: project folder is ~/coding/bsc-vuln-scanner (hyphen, NOT the design doc’s contract_scanner underscore) — was empty / not a git repo; uv 0.10.9; Docker 28.5.2 daemon running; Slither not previously installed; no chain API keys in env. — mvp-implementation-plan

  • MVP SHIPPED + live-validated (designed/planned → shipped). The 5-stage MVP (discover → resolve → fetch → Slither analyze → triage → CSV) was built subagent-driven, TDD, per the plan. The Task-10 live validation unblocked (the user’s free Etherscan V2 key worked for BSC) and passed: ran end-to-end against EA Finance’s wCC contract (0x6050d829f5a5e0ea758d8357ddcdec1381699248, a LayerZero OFT) and produced real leads — divide-before-multiply in reward calcs, unused-return on a message inspector. Value of the workflow proven; Phase 2 justified. — mvp-implementation-plan, contract-scanner

  • Verified tool-behavior reference captured (the twice-blocked, high-reuse items). Empirical gotchas found executing the MVP, several of which were disproven assumptions causing silent false-negatives: (1) slither --solc-standard-json <file> does NOT consume a JSON file (globs a dir) → compile in-process via crytic-compile SolcStandardJson (strip Etherscan {{}} wrapper, inject outputSelection["*"][""]=["ast"], materialize sources WITH a path-traversal guard since source keys are attacker-controlled); a directory-target heuristic silently compiled the wrong subtree and missed the vuln; (2) solc: set SOLC_VERSION per-process (read before solc-select’s global file), never solc-select use (races in ThreadPool); serialize in-process Slither with a module lock (not thread-safe); (3) Etherscan V2 BSC: api.etherscan.io/v2/api?chainid=56, result is a STRING on error / LIST on success (guard before indexing), free tier 3 req/s 100k/day, free key DID work for BSC despite the no-free-tier scare, bscscan.com keys deprecated; (4) DeFiLlama: BSC TVL is chainTvls["Binance"] (never “BSC”), distinct from global tvl; (5) Slither JSON has no code-snippet field (read source lines yourself), non-zero exit on BOTH compile-fail AND has-findings (branch on parsed JSON success, not exit code); (6) Docker on Apple Silicon: solc-select ships x86_64 solc only → arm64 image silently finds 0 → FROM --platform=linux/amd64; (7) pytest + uv flat layout needs pythonpath = ["."]. — verified-tool-behavior

  • Committed to a private GitHub repo. MVP committed to github.com/wowjeeez/bsc-vuln-scanner (private), commit 5be49b6 (“Initial commit: BSC smart-contract vulnerability scanner MVP”). — contract-scanner

  • Phase 2A SHIPPED: adapter-anchored address resolution (commit 536e318). Solves the bottleneck the MVP exposed — DeFiLlama’s API exposes no contract address for small protocols (returned [] for EA Finance), so the MVP could only scan a hand-fed --address. Phase 2A: each protocol’s module field names its TVL adapter in the DefiLlama/DefiLlama-Adapters GitHub repo → fetch adapter source (raw.githubusercontent.com/.../projects/<module>), regex-extract 0x addresses, verify on BSCScan (chainid 56) as the confidence gate, drop an infra denylist (Pancake router / WBNB / stables / CAKE), prefer Tier-1 (DeFiLlama own-record) over Tier-2 (adapter), cap per protocol; unresolved → needs-manual-address.csv (no silent gaps); findings carry a resolution_source column. Validation lessons (~25-protocol sample): auto-resolves ~60% (NOT ~100% — EA Finance was best-case); 36% of adapters 404 (DeFiLlama keeps stale module pointers after the GitHub file is deleted — the highest-value next lever); multi-chain adapters mix cross-chain addresses but BSCScan-verify filters most (Frax: 2/19 verify on BSC); 3rd-party infra (routers, ICHIVaultFactory for TheDeep, tokens) verifies on BSC but isn’t the protocol’s own code → mitigated by denylist + cap + transparency, full own-code attribution deferred. Part-0 robustness bugs fixed (found by a 3-agent pre-implementation validation): detect_language misclassified Solidity as Vyper on a substring match (silent skip); malformed DeFiLlama records crashed the whole batch; run_slice lacked exception isolation; proxy impl-fetch raise discarded recoverable analysis. Live result: --slug ea-finance (no --address, no web search) auto-resolves the wCC vault + StakingRewardsWCC → 16 findings; --batch --limit 8 → 116 findings across 7 protocols + 1 correctly-reported unresolved (OpenGDP, karak module mismatch), no denylisted infra, no crash. Deferred Phase 2.1: fallback for the 36% 404 adapters (top lever), chain-aware adapter parsing, web/deployer resolution, fetch-failed bucket, multi-chain, Aderyn second-opinion. — phase2-address-resolution

  • Process learning: pre-implementation 3-agent validation is a high-value pattern. Before building Phase 2A, three read-only agents ran a spec audit (caught the fundamental spec flaw — BSCScan-verified ≠ the protocol’s own code), an empirical funnel test (measured the real ~60% resolve rate and 36% 404 rate on a live sample before committing), and an MVP re-audit (found the four Part-0 silent-failure bugs in already-shipped code). Caught a design-level flaw AND real bugs before writing the implementation — cheap, worth repeating. Specs/plans on disk: docs/superpowers/{specs,plans}/2026-05-30-phase2-address-resolution*. — phase2-address-resolution

  • Findings → Supabase Postgres integration (resolves the deferred “storage past MVP” decision → Postgres). Created table public.bsc_finding in Supabase project mkofmdtdldxgmmolxxhc (org “mgmt”, Postgres 17) via MCP apply_migration (create_bsc_finding). Schema mirrors the scanner’s CSV output shape plus three DB-only columns: run_label ('batch-YYYY-MM-DD', the per-run grouping/idempotency key), resolution_source (tier1 | tier2-adapter), and a load-time score — the scanner’s output/supabase-findings.csv has no score column, so score = SEV[severity] * CONF[confidence] * tvl_usd (SEV {High:40,Medium:8,Low:2,Informational:1}, CONF {High:3,Medium:2,Low:1}, matching config.yaml triage weights) is computed at load. Indexes (score desc), (contract_address), (detector). First load batch-2026-05-30: 96 findings, 8 protocols (BTCST, DOOAR, TheDeep, OpenGDP Shared Security, StableHodl, Frax Swap, SYMMIO, Blackwing), 10 contracts, severity High 22 / Medium 53 / Low 21; top lead BTCST AdminUpgradeabilityProxy incorrect-return (~75.6M), also TheDeep ICHIVault arbitrary-send-erc20 (High/High). RLS enabled with no policies → service-role-only (anon-key frontend sees 0 rows until a SELECT policy is added; advisors INFO-only). Gotcha: hand-transcribing many multi-row INSERTs through the MCP execute_sql is error-prone — the 96-row load silently dropped one row and left a stray space in one bscscan_url; always verify with count(*) vs expected + a where col like '% %' malformed-value check on address/url columns, and prefer driving inserts from a generated SQL file. Reload = delete by run_label then re-insert. — supabase-findings-store

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